2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "../sigsession.h"
27 #include <QMouseEvent>
29 #include <boost/foreach.hpp>
31 using namespace boost;
37 Viewport::Viewport(View &parent) :
41 setMouseTracking(true);
42 setAutoFillBackground(true);
43 setBackgroundRole(QPalette::Base);
45 connect(&_view, SIGNAL(signals_moved()),
46 this, SLOT(on_signals_moved()));
49 int Viewport::get_total_height() const
52 const vector< shared_ptr<Signal> > sigs(
53 _view.session().get_signals());
54 BOOST_FOREACH(const shared_ptr<Signal> s, sigs) {
56 h = max(s->get_v_offset() + View::SignalHeight, h);
62 void Viewport::paintEvent(QPaintEvent*)
64 const vector< shared_ptr<Signal> > sigs(
65 _view.session().get_signals());
68 p.setRenderHint(QPainter::Antialiasing);
70 draw_cursors_background(p);
73 const int v_offset = _view.v_offset();
74 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
77 s->paint(p, s->get_v_offset() - v_offset, 0, width(),
78 _view.scale(), _view.offset());
81 draw_cursors_foreground(p);
86 void Viewport::mousePressEvent(QMouseEvent *event)
90 _mouse_down_point = event->pos();
91 _mouse_down_offset = _view.offset();
94 void Viewport::mouseMoveEvent(QMouseEvent *event)
98 if (event->buttons() & Qt::LeftButton)
100 _view.set_scale_offset(_view.scale(),
102 (_mouse_down_point - event->pos()).x() *
107 void Viewport::wheelEvent(QWheelEvent *event)
111 if (event->orientation() == Qt::Vertical) {
112 // Vertical scrolling is interpreted as zooming in/out
113 _view.zoom(event->delta() / 120, event->x());
114 } else if (event->orientation() == Qt::Horizontal) {
115 // Horizontal scrolling is interpreted as moving left/right
116 _view.set_scale_offset(_view.scale(),
117 event->delta() * _view.scale()
122 void Viewport::draw_cursors_background(QPainter &p)
124 if (!_view.cursors_shown())
128 p.setBrush(QBrush(View::CursorAreaColour));
130 const pair<Cursor, Cursor> &c = _view.cursors();
131 const float x1 = (c.first.time() - _view.offset()) / _view.scale();
132 const float x2 = (c.second.time() - _view.offset()) / _view.scale();
133 const int l = (int)max(min(x1, x2), 0.0f);
134 const int r = (int)min(max(x1, x2), (float)width());
136 p.drawRect(l, 0, r - l, height());
139 void Viewport::draw_cursors_foreground(QPainter &p)
141 if (!_view.cursors_shown())
144 const QRect r = rect();
145 pair<Cursor, Cursor> &cursors = _view.cursors();
146 cursors.first.paint(p, r);
147 cursors.second.paint(p, r);
150 void Viewport::on_signals_moved()